LG BD370 - Audio (Analog)

3-37
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Only for training and service purposes
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No Audio
Audio Output OK
YES
Check SMPS
YES
R947 Re-soldering
IC603(Pin8)
12V AUDIO
OK?
NO
NO
CN201 (Pin4)
12V_AUDIO
OK?
Q905 (Pin2)
LOW?
NO
Q902 Re-soldering
YES
IC903
Pin 6, 7, 8, I2S
Output OK?
NO
IC301 Check
YES
IC903 Pin 14,15
audio output before
Amp OK?
NO
IC903 Check
YES
R949, R950,
JK904 (Pin2, 5)
soldering OK?
NO
Re-soldering
YES
CA907, CA908
audio output
OK?
NO
IC904 Check
YES
7. AUDIO (ANALOG)
ELECTRICAL TROUBLESHOOTING GUIDE